Installed the new brake light switch and the BAS/ASR lights are off for the first time in 5 days. Most likely the problem is solved. I'll leave the dash apart a few days.

Problem/Symptoms were as follows:

98 E300

No battery issue

Not in limp home mode

No OBDII Codes (checked engine codes only)

Never had problem before and no other recent problems/changes.

Would not reset with the turning the steering wheel side to side.

Cruise control would not work.

BAS light comes on when I turn on the car. Interestingly, if I start the car while holding the brake down the light does not come on until I release the brake. Also, while holding down the brake, if I hit the ASR switch the Yellow Triangle warning light comes on, and if I hit it again (still holding brake pedal down), then the Yellow Triangle warning goes off. Finally, I let up the pedal and I get the light.

Light was always on when starting the car except if I held foot on the brake.

Tried to shim the old switch (pulled out stem and put a 1/32" shim between the switch and the pedal), no affect.

Brake lights always functioned correctly.

Thanks Guys - always figured it was a 90% chance it was the switch. Shopforum works again.

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03 SLK320
98 E300TD 320k Miles
75 914
02 Suburban